The cerebellum is located in the posterior cranial fossa, and the bleeding will directly compress the brainstem and cause coma, and the respiration and heartbeat are affected, which is a relatively dangerous emergency. The patient’s condition is now critical and the onset is urgent. It may be better if the patient has time for surgery to remove the hematoma and decompression, but it seems that there is no great need for it now. We are keeping the current treatment and listening to the advice of the doctors in the hospital. At this point treatment is more difficult, in addition to symptomatic treatment, but also to prevent complications. Of course there is a possibility that the condition will improve. A long coma indicates serious damage to the midbrain and brainstem, and may have a poor prognosis.